Hello I'm looking to supply a shed with a light and a double socket. I am happy to run a new cable from the current domestic consumer unit protected by RCD. The cable would travel approx 3 meters through the attic, through a hole in the external wall drop down approx 5 meters as i live on the first floor, then approx 5 meters across the garden into the shed. My first question is what size of cable to use? the second question would be,is there particluar required conduit i can fix to the external wall, and also dig into the ground to run the cable?
Any advice would be appreciated.